Commit | Line | Data |
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c906108c | 1 | /* Multi-process/thread control for GDB, the GNU debugger. |
8926118c | 2 | |
6aba47ca | 3 | Copyright (C) 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
7b6bb8da | 4 | 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010, 2011 |
0fb0cc75 | 5 | Free Software Foundation, Inc. |
8926118c | 6 | |
b6ba6518 | 7 | Contributed by Lynx Real-Time Systems, Inc. Los Gatos, CA. |
c906108c | 8 | |
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "symtab.h" | |
26 | #include "frame.h" | |
27 | #include "inferior.h" | |
28 | #include "environ.h" | |
29 | #include "value.h" | |
30 | #include "target.h" | |
31 | #include "gdbthread.h" | |
60250e8b | 32 | #include "exceptions.h" |
c906108c SS |
33 | #include "command.h" |
34 | #include "gdbcmd.h" | |
4e052eda | 35 | #include "regcache.h" |
5b7f31a4 | 36 | #include "gdb.h" |
b66d6d2e | 37 | #include "gdb_string.h" |
c906108c SS |
38 | |
39 | #include <ctype.h> | |
40 | #include <sys/types.h> | |
41 | #include <signal.h> | |
8b93c638 | 42 | #include "ui-out.h" |
683f2885 | 43 | #include "observer.h" |
d4fc5b1e | 44 | #include "annotate.h" |
94cc34af | 45 | #include "cli/cli-decode.h" |
60f98dde | 46 | #include "gdb_regex.h" |
aea5b279 | 47 | #include "cli/cli-utils.h" |
94cc34af | 48 | |
c378eb4e | 49 | /* Definition of struct thread_info exported to gdbthread.h. */ |
c906108c | 50 | |
c378eb4e | 51 | /* Prototypes for exported functions. */ |
c906108c | 52 | |
a14ed312 | 53 | void _initialize_thread (void); |
c906108c | 54 | |
c378eb4e | 55 | /* Prototypes for local functions. */ |
c906108c | 56 | |
c906108c SS |
57 | static struct thread_info *thread_list = NULL; |
58 | static int highest_thread_num; | |
59 | ||
a14ed312 KB |
60 | static void thread_command (char *tidstr, int from_tty); |
61 | static void thread_apply_all_command (char *, int); | |
62 | static int thread_alive (struct thread_info *); | |
63 | static void info_threads_command (char *, int); | |
64 | static void thread_apply_command (char *, int); | |
39f77062 | 65 | static void restore_current_thread (ptid_t); |
a14ed312 | 66 | static void prune_threads (void); |
c906108c | 67 | |
4f8d22e3 PA |
68 | /* Frontend view of the thread state. Possible extensions: stepping, |
69 | finishing, until(ling),... */ | |
70 | enum thread_state | |
71 | { | |
72 | THREAD_STOPPED, | |
73 | THREAD_RUNNING, | |
74 | THREAD_EXITED, | |
75 | }; | |
76 | ||
a5321aa4 | 77 | struct thread_info* |
4e1c45ea | 78 | inferior_thread (void) |
8601f500 | 79 | { |
e09875d4 | 80 | struct thread_info *tp = find_thread_ptid (inferior_ptid); |
4e1c45ea PA |
81 | gdb_assert (tp); |
82 | return tp; | |
83 | } | |
8601f500 | 84 | |
4e1c45ea PA |
85 | void |
86 | delete_step_resume_breakpoint (struct thread_info *tp) | |
87 | { | |
8358c15c | 88 | if (tp && tp->control.step_resume_breakpoint) |
8601f500 | 89 | { |
8358c15c JK |
90 | delete_breakpoint (tp->control.step_resume_breakpoint); |
91 | tp->control.step_resume_breakpoint = NULL; | |
8601f500 MS |
92 | } |
93 | } | |
94 | ||
186c406b TT |
95 | void |
96 | delete_exception_resume_breakpoint (struct thread_info *tp) | |
97 | { | |
98 | if (tp && tp->control.exception_resume_breakpoint) | |
99 | { | |
100 | delete_breakpoint (tp->control.exception_resume_breakpoint); | |
101 | tp->control.exception_resume_breakpoint = NULL; | |
102 | } | |
103 | } | |
104 | ||
7c952b6d | 105 | static void |
4f8d22e3 | 106 | clear_thread_inferior_resources (struct thread_info *tp) |
7c952b6d ND |
107 | { |
108 | /* NOTE: this will take care of any left-over step_resume breakpoints, | |
4d8453a5 DJ |
109 | but not any user-specified thread-specific breakpoints. We can not |
110 | delete the breakpoint straight-off, because the inferior might not | |
111 | be stopped at the moment. */ | |
8358c15c | 112 | if (tp->control.step_resume_breakpoint) |
4f8d22e3 | 113 | { |
8358c15c JK |
114 | tp->control.step_resume_breakpoint->disposition = disp_del_at_next_stop; |
115 | tp->control.step_resume_breakpoint = NULL; | |
4f8d22e3 | 116 | } |
7c952b6d | 117 | |
186c406b TT |
118 | if (tp->control.exception_resume_breakpoint) |
119 | { | |
120 | tp->control.exception_resume_breakpoint->disposition | |
121 | = disp_del_at_next_stop; | |
122 | tp->control.exception_resume_breakpoint = NULL; | |
123 | } | |
124 | ||
16c381f0 | 125 | bpstat_clear (&tp->control.stop_bpstat); |
95e54da7 PA |
126 | |
127 | discard_all_intermediate_continuations_thread (tp); | |
128 | discard_all_continuations_thread (tp); | |
186c406b TT |
129 | |
130 | delete_longjmp_breakpoint (tp->num); | |
4f8d22e3 PA |
131 | } |
132 | ||
133 | static void | |
134 | free_thread (struct thread_info *tp) | |
135 | { | |
136 | clear_thread_inferior_resources (tp); | |
a474d7c2 | 137 | |
7c952b6d | 138 | if (tp->private) |
dc146f7c VP |
139 | { |
140 | if (tp->private_dtor) | |
141 | tp->private_dtor (tp->private); | |
142 | else | |
143 | xfree (tp->private); | |
144 | } | |
7c952b6d | 145 | |
4694da01 | 146 | xfree (tp->name); |
b8c9b27d | 147 | xfree (tp); |
7c952b6d ND |
148 | } |
149 | ||
c906108c | 150 | void |
fba45db2 | 151 | init_thread_list (void) |
c906108c SS |
152 | { |
153 | struct thread_info *tp, *tpnext; | |
154 | ||
7c952b6d | 155 | highest_thread_num = 0; |
8ea051c5 | 156 | |
c906108c SS |
157 | if (!thread_list) |
158 | return; | |
159 | ||
160 | for (tp = thread_list; tp; tp = tpnext) | |
161 | { | |
162 | tpnext = tp->next; | |
7c952b6d | 163 | free_thread (tp); |
c906108c SS |
164 | } |
165 | ||
166 | thread_list = NULL; | |
c906108c SS |
167 | } |
168 | ||
e58b0e63 PA |
169 | /* Allocate a new thread with target id PTID and add it to the thread |
170 | list. */ | |
171 | ||
172 | static struct thread_info * | |
173 | new_thread (ptid_t ptid) | |
174 | { | |
175 | struct thread_info *tp; | |
176 | ||
177 | tp = xcalloc (1, sizeof (*tp)); | |
178 | ||
179 | tp->ptid = ptid; | |
180 | tp->num = ++highest_thread_num; | |
181 | tp->next = thread_list; | |
182 | thread_list = tp; | |
183 | ||
184 | /* Nothing to follow yet. */ | |
185 | tp->pending_follow.kind = TARGET_WAITKIND_SPURIOUS; | |
186 | tp->state_ = THREAD_STOPPED; | |
187 | ||
188 | return tp; | |
189 | } | |
190 | ||
0d06e24b | 191 | struct thread_info * |
93815fbf | 192 | add_thread_silent (ptid_t ptid) |
c906108c SS |
193 | { |
194 | struct thread_info *tp; | |
195 | ||
e09875d4 | 196 | tp = find_thread_ptid (ptid); |
4f8d22e3 PA |
197 | if (tp) |
198 | /* Found an old thread with the same id. It has to be dead, | |
199 | otherwise we wouldn't be adding a new thread with the same id. | |
200 | The OS is reusing this id --- delete it, and recreate a new | |
201 | one. */ | |
202 | { | |
203 | /* In addition to deleting the thread, if this is the current | |
dcf4fbde PA |
204 | thread, then we need to take care that delete_thread doesn't |
205 | really delete the thread if it is inferior_ptid. Create a | |
206 | new template thread in the list with an invalid ptid, switch | |
207 | to it, delete the original thread, reset the new thread's | |
208 | ptid, and switch to it. */ | |
4f8d22e3 PA |
209 | |
210 | if (ptid_equal (inferior_ptid, ptid)) | |
211 | { | |
c820c52a | 212 | tp = new_thread (null_ptid); |
dcf4fbde PA |
213 | |
214 | /* Make switch_to_thread not read from the thread. */ | |
215 | tp->state_ = THREAD_EXITED; | |
c820c52a | 216 | switch_to_thread (null_ptid); |
4f8d22e3 PA |
217 | |
218 | /* Now we can delete it. */ | |
219 | delete_thread (ptid); | |
220 | ||
dcf4fbde | 221 | /* Now reset its ptid, and reswitch inferior_ptid to it. */ |
4f8d22e3 | 222 | tp->ptid = ptid; |
dcf4fbde | 223 | tp->state_ = THREAD_STOPPED; |
4f8d22e3 PA |
224 | switch_to_thread (ptid); |
225 | ||
226 | observer_notify_new_thread (tp); | |
227 | ||
228 | /* All done. */ | |
229 | return tp; | |
230 | } | |
231 | else | |
232 | /* Just go ahead and delete it. */ | |
233 | delete_thread (ptid); | |
234 | } | |
235 | ||
e58b0e63 | 236 | tp = new_thread (ptid); |
cfc01461 VP |
237 | observer_notify_new_thread (tp); |
238 | ||
0d06e24b | 239 | return tp; |
c906108c SS |
240 | } |
241 | ||
93815fbf | 242 | struct thread_info * |
17faa917 | 243 | add_thread_with_info (ptid_t ptid, struct private_thread_info *private) |
93815fbf VP |
244 | { |
245 | struct thread_info *result = add_thread_silent (ptid); | |
246 | ||
17faa917 DJ |
247 | result->private = private; |
248 | ||
93815fbf | 249 | if (print_thread_events) |
fd532e2e | 250 | printf_unfiltered (_("[New %s]\n"), target_pid_to_str (ptid)); |
d4fc5b1e NR |
251 | |
252 | annotate_new_thread (); | |
93815fbf VP |
253 | return result; |
254 | } | |
255 | ||
17faa917 DJ |
256 | struct thread_info * |
257 | add_thread (ptid_t ptid) | |
258 | { | |
259 | return add_thread_with_info (ptid, NULL); | |
260 | } | |
261 | ||
5e0b29c1 PA |
262 | /* Delete thread PTID. If SILENT, don't notify the observer of this |
263 | exit. */ | |
264 | static void | |
265 | delete_thread_1 (ptid_t ptid, int silent) | |
c906108c SS |
266 | { |
267 | struct thread_info *tp, *tpprev; | |
268 | ||
269 | tpprev = NULL; | |
270 | ||
271 | for (tp = thread_list; tp; tpprev = tp, tp = tp->next) | |
39f77062 | 272 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
273 | break; |
274 | ||
275 | if (!tp) | |
276 | return; | |
277 | ||
4f8d22e3 PA |
278 | /* If this is the current thread, or there's code out there that |
279 | relies on it existing (refcount > 0) we can't delete yet. Mark | |
280 | it as exited, and notify it. */ | |
281 | if (tp->refcount > 0 | |
282 | || ptid_equal (tp->ptid, inferior_ptid)) | |
283 | { | |
284 | if (tp->state_ != THREAD_EXITED) | |
285 | { | |
a07daef3 | 286 | observer_notify_thread_exit (tp, silent); |
4f8d22e3 PA |
287 | |
288 | /* Tag it as exited. */ | |
289 | tp->state_ = THREAD_EXITED; | |
290 | ||
291 | /* Clear breakpoints, etc. associated with this thread. */ | |
292 | clear_thread_inferior_resources (tp); | |
293 | } | |
294 | ||
295 | /* Will be really deleted some other time. */ | |
296 | return; | |
297 | } | |
298 | ||
c906108c SS |
299 | if (tpprev) |
300 | tpprev->next = tp->next; | |
301 | else | |
302 | thread_list = tp->next; | |
303 | ||
4f8d22e3 | 304 | /* Notify thread exit, but only if we haven't already. */ |
a07daef3 PA |
305 | if (tp->state_ != THREAD_EXITED) |
306 | observer_notify_thread_exit (tp, silent); | |
063bfe2e | 307 | |
7c952b6d | 308 | free_thread (tp); |
c906108c SS |
309 | } |
310 | ||
4f8d22e3 PA |
311 | /* Delete thread PTID and notify of thread exit. If this is |
312 | inferior_ptid, don't actually delete it, but tag it as exited and | |
313 | do the notification. If PTID is the user selected thread, clear | |
314 | it. */ | |
5e0b29c1 PA |
315 | void |
316 | delete_thread (ptid_t ptid) | |
317 | { | |
318 | delete_thread_1 (ptid, 0 /* not silent */); | |
319 | } | |
320 | ||
321 | void | |
322 | delete_thread_silent (ptid_t ptid) | |
323 | { | |
324 | delete_thread_1 (ptid, 1 /* silent */); | |
325 | } | |
326 | ||
1e92afda | 327 | struct thread_info * |
fba45db2 | 328 | find_thread_id (int num) |
c906108c SS |
329 | { |
330 | struct thread_info *tp; | |
331 | ||
332 | for (tp = thread_list; tp; tp = tp->next) | |
333 | if (tp->num == num) | |
334 | return tp; | |
335 | ||
336 | return NULL; | |
337 | } | |
338 | ||
39f77062 | 339 | /* Find a thread_info by matching PTID. */ |
0d06e24b | 340 | struct thread_info * |
e09875d4 | 341 | find_thread_ptid (ptid_t ptid) |
0d06e24b JM |
342 | { |
343 | struct thread_info *tp; | |
344 | ||
345 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 346 | if (ptid_equal (tp->ptid, ptid)) |
0d06e24b JM |
347 | return tp; |
348 | ||
349 | return NULL; | |
350 | } | |
351 | ||
352 | /* | |
353 | * Thread iterator function. | |
354 | * | |
355 | * Calls a callback function once for each thread, so long as | |
356 | * the callback function returns false. If the callback function | |
357 | * returns true, the iteration will end and the current thread | |
358 | * will be returned. This can be useful for implementing a | |
359 | * search for a thread with arbitrary attributes, or for applying | |
360 | * some operation to every thread. | |
361 | * | |
362 | * FIXME: some of the existing functionality, such as | |
363 | * "Thread apply all", might be rewritten using this functionality. | |
364 | */ | |
365 | ||
366 | struct thread_info * | |
fd118b61 KB |
367 | iterate_over_threads (int (*callback) (struct thread_info *, void *), |
368 | void *data) | |
0d06e24b | 369 | { |
4f8d22e3 | 370 | struct thread_info *tp, *next; |
0d06e24b | 371 | |
4f8d22e3 PA |
372 | for (tp = thread_list; tp; tp = next) |
373 | { | |
374 | next = tp->next; | |
375 | if ((*callback) (tp, data)) | |
376 | return tp; | |
377 | } | |
0d06e24b JM |
378 | |
379 | return NULL; | |
380 | } | |
381 | ||
20874c92 VP |
382 | int |
383 | thread_count (void) | |
384 | { | |
385 | int result = 0; | |
386 | struct thread_info *tp; | |
387 | ||
388 | for (tp = thread_list; tp; tp = tp->next) | |
389 | ++result; | |
390 | ||
391 | return result; | |
392 | } | |
393 | ||
c906108c | 394 | int |
fba45db2 | 395 | valid_thread_id (int num) |
c906108c SS |
396 | { |
397 | struct thread_info *tp; | |
398 | ||
399 | for (tp = thread_list; tp; tp = tp->next) | |
400 | if (tp->num == num) | |
401 | return 1; | |
402 | ||
403 | return 0; | |
404 | } | |
405 | ||
406 | int | |
39f77062 | 407 | pid_to_thread_id (ptid_t ptid) |
c906108c SS |
408 | { |
409 | struct thread_info *tp; | |
410 | ||
411 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 412 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
413 | return tp->num; |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
39f77062 | 418 | ptid_t |
fba45db2 | 419 | thread_id_to_pid (int num) |
c906108c SS |
420 | { |
421 | struct thread_info *thread = find_thread_id (num); | |
5d502164 | 422 | |
c906108c | 423 | if (thread) |
39f77062 | 424 | return thread->ptid; |
c906108c | 425 | else |
39f77062 | 426 | return pid_to_ptid (-1); |
c906108c SS |
427 | } |
428 | ||
429 | int | |
39f77062 | 430 | in_thread_list (ptid_t ptid) |
c906108c SS |
431 | { |
432 | struct thread_info *tp; | |
433 | ||
434 | for (tp = thread_list; tp; tp = tp->next) | |
39f77062 | 435 | if (ptid_equal (tp->ptid, ptid)) |
c906108c SS |
436 | return 1; |
437 | ||
c378eb4e | 438 | return 0; /* Never heard of 'im. */ |
c906108c | 439 | } |
8926118c | 440 | |
bad34192 PA |
441 | /* Finds the first thread of the inferior given by PID. If PID is -1, |
442 | return the first thread in the list. */ | |
443 | ||
444 | struct thread_info * | |
445 | first_thread_of_process (int pid) | |
446 | { | |
447 | struct thread_info *tp, *ret = NULL; | |
448 | ||
449 | for (tp = thread_list; tp; tp = tp->next) | |
450 | if (pid == -1 || ptid_get_pid (tp->ptid) == pid) | |
451 | if (ret == NULL || tp->num < ret->num) | |
452 | ret = tp; | |
453 | ||
454 | return ret; | |
455 | } | |
456 | ||
2277426b PA |
457 | struct thread_info * |
458 | any_thread_of_process (int pid) | |
459 | { | |
460 | struct thread_info *tp; | |
461 | ||
462 | for (tp = thread_list; tp; tp = tp->next) | |
463 | if (ptid_get_pid (tp->ptid) == pid) | |
464 | return tp; | |
465 | ||
466 | return NULL; | |
467 | } | |
468 | ||
6c95b8df PA |
469 | struct thread_info * |
470 | any_live_thread_of_process (int pid) | |
471 | { | |
472 | struct thread_info *tp; | |
473 | struct thread_info *tp_running = NULL; | |
474 | ||
475 | for (tp = thread_list; tp; tp = tp->next) | |
476 | if (ptid_get_pid (tp->ptid) == pid) | |
477 | { | |
478 | if (tp->state_ == THREAD_STOPPED) | |
479 | return tp; | |
480 | else if (tp->state_ == THREAD_RUNNING) | |
481 | tp_running = tp; | |
482 | } | |
483 | ||
484 | return tp_running; | |
485 | } | |
486 | ||
8b93c638 | 487 | /* Print a list of thread ids currently known, and the total number of |
c378eb4e | 488 | threads. To be used from within catch_errors. */ |
6949171e JJ |
489 | static int |
490 | do_captured_list_thread_ids (struct ui_out *uiout, void *arg) | |
8b93c638 JM |
491 | { |
492 | struct thread_info *tp; | |
493 | int num = 0; | |
3b31d625 | 494 | struct cleanup *cleanup_chain; |
592375cd | 495 | int current_thread = -1; |
8b93c638 | 496 | |
dc146f7c | 497 | update_thread_list (); |
7990a578 | 498 | |
3b31d625 | 499 | cleanup_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "thread-ids"); |
8b93c638 JM |
500 | |
501 | for (tp = thread_list; tp; tp = tp->next) | |
502 | { | |
4f8d22e3 PA |
503 | if (tp->state_ == THREAD_EXITED) |
504 | continue; | |
592375cd VP |
505 | |
506 | if (ptid_equal (tp->ptid, inferior_ptid)) | |
507 | current_thread = tp->num; | |
508 | ||
8b93c638 JM |
509 | num++; |
510 | ui_out_field_int (uiout, "thread-id", tp->num); | |
511 | } | |
512 | ||
3b31d625 | 513 | do_cleanups (cleanup_chain); |
592375cd VP |
514 | |
515 | if (current_thread != -1) | |
516 | ui_out_field_int (uiout, "current-thread-id", current_thread); | |
8b93c638 JM |
517 | ui_out_field_int (uiout, "number-of-threads", num); |
518 | return GDB_RC_OK; | |
519 | } | |
520 | ||
521 | /* Official gdblib interface function to get a list of thread ids and | |
c378eb4e | 522 | the total number. */ |
8b93c638 | 523 | enum gdb_rc |
ce43223b | 524 | gdb_list_thread_ids (struct ui_out *uiout, char **error_message) |
8b93c638 | 525 | { |
b0b13bb4 DJ |
526 | if (catch_exceptions_with_msg (uiout, do_captured_list_thread_ids, NULL, |
527 | error_message, RETURN_MASK_ALL) < 0) | |
528 | return GDB_RC_FAIL; | |
529 | return GDB_RC_OK; | |
8b93c638 | 530 | } |
c906108c | 531 | |
c378eb4e | 532 | /* Return true if TP is an active thread. */ |
c906108c | 533 | static int |
fba45db2 | 534 | thread_alive (struct thread_info *tp) |
c906108c | 535 | { |
4f8d22e3 | 536 | if (tp->state_ == THREAD_EXITED) |
c906108c | 537 | return 0; |
39f77062 | 538 | if (!target_thread_alive (tp->ptid)) |
4f8d22e3 | 539 | return 0; |
c906108c SS |
540 | return 1; |
541 | } | |
542 | ||
543 | static void | |
fba45db2 | 544 | prune_threads (void) |
c906108c | 545 | { |
d4f3574e | 546 | struct thread_info *tp, *next; |
c906108c | 547 | |
c906108c SS |
548 | for (tp = thread_list; tp; tp = next) |
549 | { | |
550 | next = tp->next; | |
551 | if (!thread_alive (tp)) | |
39f77062 | 552 | delete_thread (tp->ptid); |
c906108c SS |
553 | } |
554 | } | |
555 | ||
5231c1fd PA |
556 | void |
557 | thread_change_ptid (ptid_t old_ptid, ptid_t new_ptid) | |
558 | { | |
82f73884 PA |
559 | struct inferior *inf; |
560 | struct thread_info *tp; | |
561 | ||
562 | /* It can happen that what we knew as the target inferior id | |
563 | changes. E.g, target remote may only discover the remote process | |
564 | pid after adding the inferior to GDB's list. */ | |
565 | inf = find_inferior_pid (ptid_get_pid (old_ptid)); | |
566 | inf->pid = ptid_get_pid (new_ptid); | |
567 | ||
e09875d4 | 568 | tp = find_thread_ptid (old_ptid); |
5231c1fd PA |
569 | tp->ptid = new_ptid; |
570 | ||
571 | observer_notify_thread_ptid_changed (old_ptid, new_ptid); | |
572 | } | |
573 | ||
e1ac3328 VP |
574 | void |
575 | set_running (ptid_t ptid, int running) | |
576 | { | |
577 | struct thread_info *tp; | |
d90e17a7 | 578 | int all = ptid_equal (ptid, minus_one_ptid); |
e1ac3328 | 579 | |
e1ac3328 VP |
580 | /* We try not to notify the observer if no thread has actually changed |
581 | the running state -- merely to reduce the number of messages to | |
582 | frontend. Frontend is supposed to handle multiple *running just fine. */ | |
d90e17a7 | 583 | if (all || ptid_is_pid (ptid)) |
e1ac3328 VP |
584 | { |
585 | int any_started = 0; | |
5d502164 | 586 | |
e1ac3328 | 587 | for (tp = thread_list; tp; tp = tp->next) |
d90e17a7 PA |
588 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
589 | { | |
590 | if (tp->state_ == THREAD_EXITED) | |
591 | continue; | |
592 | if (running && tp->state_ == THREAD_STOPPED) | |
593 | any_started = 1; | |
594 | tp->state_ = running ? THREAD_RUNNING : THREAD_STOPPED; | |
595 | } | |
c5a4d20b PA |
596 | if (any_started) |
597 | observer_notify_target_resumed (ptid); | |
e1ac3328 VP |
598 | } |
599 | else | |
600 | { | |
4f8d22e3 | 601 | int started = 0; |
5d502164 | 602 | |
e09875d4 | 603 | tp = find_thread_ptid (ptid); |
e1ac3328 | 604 | gdb_assert (tp); |
4f8d22e3 PA |
605 | gdb_assert (tp->state_ != THREAD_EXITED); |
606 | if (running && tp->state_ == THREAD_STOPPED) | |
607 | started = 1; | |
608 | tp->state_ = running ? THREAD_RUNNING : THREAD_STOPPED; | |
c5a4d20b | 609 | if (started) |
4f8d22e3 PA |
610 | observer_notify_target_resumed (ptid); |
611 | } | |
e1ac3328 VP |
612 | } |
613 | ||
4f8d22e3 PA |
614 | static int |
615 | is_thread_state (ptid_t ptid, enum thread_state state) | |
e1ac3328 VP |
616 | { |
617 | struct thread_info *tp; | |
618 | ||
e09875d4 | 619 | tp = find_thread_ptid (ptid); |
e1ac3328 | 620 | gdb_assert (tp); |
4f8d22e3 PA |
621 | return tp->state_ == state; |
622 | } | |
623 | ||
624 | int | |
625 | is_stopped (ptid_t ptid) | |
626 | { | |
4f8d22e3 PA |
627 | return is_thread_state (ptid, THREAD_STOPPED); |
628 | } | |
629 | ||
630 | int | |
631 | is_exited (ptid_t ptid) | |
632 | { | |
4f8d22e3 PA |
633 | return is_thread_state (ptid, THREAD_EXITED); |
634 | } | |
635 | ||
636 | int | |
637 | is_running (ptid_t ptid) | |
638 | { | |
4f8d22e3 | 639 | return is_thread_state (ptid, THREAD_RUNNING); |
e1ac3328 VP |
640 | } |
641 | ||
8ea051c5 PA |
642 | int |
643 | any_running (void) | |
644 | { | |
645 | struct thread_info *tp; | |
646 | ||
8ea051c5 | 647 | for (tp = thread_list; tp; tp = tp->next) |
4f8d22e3 | 648 | if (tp->state_ == THREAD_RUNNING) |
8ea051c5 PA |
649 | return 1; |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | int | |
655 | is_executing (ptid_t ptid) | |
656 | { | |
657 | struct thread_info *tp; | |
658 | ||
e09875d4 | 659 | tp = find_thread_ptid (ptid); |
8ea051c5 PA |
660 | gdb_assert (tp); |
661 | return tp->executing_; | |
662 | } | |
663 | ||
664 | void | |
665 | set_executing (ptid_t ptid, int executing) | |
666 | { | |
667 | struct thread_info *tp; | |
d90e17a7 | 668 | int all = ptid_equal (ptid, minus_one_ptid); |
8ea051c5 | 669 | |
d90e17a7 | 670 | if (all || ptid_is_pid (ptid)) |
8ea051c5 PA |
671 | { |
672 | for (tp = thread_list; tp; tp = tp->next) | |
d90e17a7 PA |
673 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) |
674 | tp->executing_ = executing; | |
8ea051c5 PA |
675 | } |
676 | else | |
677 | { | |
e09875d4 | 678 | tp = find_thread_ptid (ptid); |
8ea051c5 PA |
679 | gdb_assert (tp); |
680 | tp->executing_ = executing; | |
681 | } | |
682 | } | |
683 | ||
252fbfc8 PA |
684 | void |
685 | set_stop_requested (ptid_t ptid, int stop) | |
686 | { | |
687 | struct thread_info *tp; | |
688 | int all = ptid_equal (ptid, minus_one_ptid); | |
689 | ||
690 | if (all || ptid_is_pid (ptid)) | |
691 | { | |
692 | for (tp = thread_list; tp; tp = tp->next) | |
693 | if (all || ptid_get_pid (tp->ptid) == ptid_get_pid (ptid)) | |
694 | tp->stop_requested = stop; | |
695 | } | |
696 | else | |
697 | { | |
e09875d4 | 698 | tp = find_thread_ptid (ptid); |
252fbfc8 PA |
699 | gdb_assert (tp); |
700 | tp->stop_requested = stop; | |
701 | } | |
702 | ||
703 | /* Call the stop requested observer so other components of GDB can | |
704 | react to this request. */ | |
705 | if (stop) | |
706 | observer_notify_thread_stop_requested (ptid); | |
707 | } | |
708 | ||
29f49a6a PA |
709 | void |
710 | finish_thread_state (ptid_t ptid) | |
711 | { | |
712 | struct thread_info *tp; | |
713 | int all; | |
714 | int any_started = 0; | |
715 | ||
716 | all = ptid_equal (ptid, minus_one_ptid); | |
717 | ||
718 | if (all || ptid_is_pid (ptid)) | |
719 | { | |
720 | for (tp = thread_list; tp; tp = tp->next) | |
721 | { | |
722 | if (tp->state_ == THREAD_EXITED) | |
723 | continue; | |
724 | if (all || ptid_get_pid (ptid) == ptid_get_pid (tp->ptid)) | |
725 | { | |
726 | if (tp->executing_ && tp->state_ == THREAD_STOPPED) | |
727 | any_started = 1; | |
728 | tp->state_ = tp->executing_ ? THREAD_RUNNING : THREAD_STOPPED; | |
729 | } | |
730 | } | |
731 | } | |
732 | else | |
733 | { | |
e09875d4 | 734 | tp = find_thread_ptid (ptid); |
29f49a6a PA |
735 | gdb_assert (tp); |
736 | if (tp->state_ != THREAD_EXITED) | |
737 | { | |
738 | if (tp->executing_ && tp->state_ == THREAD_STOPPED) | |
739 | any_started = 1; | |
740 | tp->state_ = tp->executing_ ? THREAD_RUNNING : THREAD_STOPPED; | |
741 | } | |
742 | } | |
743 | ||
744 | if (any_started) | |
745 | observer_notify_target_resumed (ptid); | |
746 | } | |
747 | ||
748 | void | |
749 | finish_thread_state_cleanup (void *arg) | |
750 | { | |
751 | ptid_t *ptid_p = arg; | |
752 | ||
753 | gdb_assert (arg); | |
754 | ||
755 | finish_thread_state (*ptid_p); | |
756 | } | |
757 | ||
8e8901c5 | 758 | /* Prints the list of threads and their details on UIOUT. |
aea5b279 | 759 | This is a version of 'info_threads_command' suitable for |
c378eb4e | 760 | use from MI. |
4f8d22e3 | 761 | If REQUESTED_THREAD is not -1, it's the GDB id of the thread |
8e8901c5 | 762 | that should be printed. Otherwise, all threads are |
c378eb4e | 763 | printed. |
3ee1c036 | 764 | If PID is not -1, only print threads from the process PID. |
c378eb4e | 765 | Otherwise, threads from all attached PIDs are printed. |
3ee1c036 VP |
766 | If both REQUESTED_THREAD and PID are not -1, then the thread |
767 | is printed if it belongs to the specified process. Otherwise, | |
768 | an error is raised. */ | |
8e8901c5 | 769 | void |
aea5b279 | 770 | print_thread_info (struct ui_out *uiout, char *requested_threads, int pid) |
c906108c SS |
771 | { |
772 | struct thread_info *tp; | |
39f77062 | 773 | ptid_t current_ptid; |
99b3d574 | 774 | struct cleanup *old_chain; |
4694da01 | 775 | char *extra_info, *name, *target_id; |
8e8901c5 | 776 | int current_thread = -1; |
c906108c | 777 | |
dc146f7c | 778 | update_thread_list (); |
39f77062 | 779 | current_ptid = inferior_ptid; |
4f8d22e3 PA |
780 | |
781 | /* We'll be switching threads temporarily. */ | |
782 | old_chain = make_cleanup_restore_current_thread (); | |
783 | ||
a7658b96 TT |
784 | /* For backward compatibility, we make a list for MI. A table is |
785 | preferable for the CLI, though, because it shows table | |
786 | headers. */ | |
787 | if (ui_out_is_mi_like_p (uiout)) | |
788 | make_cleanup_ui_out_list_begin_end (uiout, "threads"); | |
789 | else | |
790 | { | |
791 | int n_threads = 0; | |
792 | ||
793 | for (tp = thread_list; tp; tp = tp->next) | |
794 | { | |
aea5b279 | 795 | if (!number_is_in_list (requested_threads, tp->num)) |
a7658b96 TT |
796 | continue; |
797 | ||
798 | if (pid != -1 && PIDGET (tp->ptid) != pid) | |
799 | continue; | |
800 | ||
801 | if (tp->state_ == THREAD_EXITED) | |
802 | continue; | |
803 | ||
804 | ++n_threads; | |
805 | } | |
806 | ||
807 | if (n_threads == 0) | |
808 | { | |
aea5b279 | 809 | if (requested_threads == NULL || *requested_threads == '\0') |
a7658b96 TT |
810 | ui_out_message (uiout, 0, _("No threads.\n")); |
811 | else | |
aea5b279 MS |
812 | ui_out_message (uiout, 0, _("No threads match '%s'.\n"), |
813 | requested_threads); | |
a7658b96 TT |
814 | do_cleanups (old_chain); |
815 | return; | |
816 | } | |
817 | ||
4694da01 | 818 | make_cleanup_ui_out_table_begin_end (uiout, 4, n_threads, "threads"); |
a7658b96 TT |
819 | |
820 | ui_out_table_header (uiout, 1, ui_left, "current", ""); | |
821 | ui_out_table_header (uiout, 4, ui_left, "id", "Id"); | |
822 | ui_out_table_header (uiout, 17, ui_left, "target-id", "Target Id"); | |
a7658b96 TT |
823 | ui_out_table_header (uiout, 1, ui_left, "frame", "Frame"); |
824 | ui_out_table_body (uiout); | |
825 | } | |
826 | ||
c906108c SS |
827 | for (tp = thread_list; tp; tp = tp->next) |
828 | { | |
8e8901c5 | 829 | struct cleanup *chain2; |
dc146f7c | 830 | int core; |
8e8901c5 | 831 | |
aea5b279 | 832 | if (!number_is_in_list (requested_threads, tp->num)) |
8e8901c5 VP |
833 | continue; |
834 | ||
3ee1c036 VP |
835 | if (pid != -1 && PIDGET (tp->ptid) != pid) |
836 | { | |
aea5b279 | 837 | if (requested_threads != NULL && *requested_threads != '\0') |
3ee1c036 VP |
838 | error (_("Requested thread not found in requested process")); |
839 | continue; | |
840 | } | |
841 | ||
4f8d22e3 PA |
842 | if (ptid_equal (tp->ptid, current_ptid)) |
843 | current_thread = tp->num; | |
844 | ||
845 | if (tp->state_ == THREAD_EXITED) | |
846 | continue; | |
847 | ||
8e8901c5 VP |
848 | chain2 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
849 | ||
a7658b96 TT |
850 | if (ui_out_is_mi_like_p (uiout)) |
851 | { | |
852 | /* Compatibility. */ | |
853 | if (ptid_equal (tp->ptid, current_ptid)) | |
854 | ui_out_text (uiout, "* "); | |
855 | else | |
856 | ui_out_text (uiout, " "); | |
857 | } | |
c906108c | 858 | else |
a7658b96 TT |
859 | { |
860 | if (ptid_equal (tp->ptid, current_ptid)) | |
861 | ui_out_field_string (uiout, "current", "*"); | |
862 | else | |
863 | ui_out_field_skip (uiout, "current"); | |
864 | } | |
c906108c | 865 | |
8e8901c5 | 866 | ui_out_field_int (uiout, "id", tp->num); |
0d06e24b | 867 | |
4694da01 TT |
868 | /* For the CLI, we stuff everything into the target-id field. |
869 | This is a gross hack to make the output come out looking | |
870 | correct. The underlying problem here is that ui-out has no | |
871 | way to specify that a field's space allocation should be | |
872 | shared by several fields. For MI, we do the right thing | |
873 | instead. */ | |
874 | ||
875 | target_id = target_pid_to_str (tp->ptid); | |
ed406532 | 876 | extra_info = target_extra_thread_info (tp); |
4694da01 TT |
877 | name = tp->name ? tp->name : target_thread_name (tp); |
878 | ||
879 | if (ui_out_is_mi_like_p (uiout)) | |
8e8901c5 | 880 | { |
4694da01 TT |
881 | ui_out_field_string (uiout, "target-id", target_id); |
882 | if (extra_info) | |
883 | ui_out_field_string (uiout, "details", extra_info); | |
884 | if (name) | |
885 | ui_out_field_string (uiout, "name", name); | |
886 | } | |
887 | else | |
888 | { | |
889 | struct cleanup *str_cleanup; | |
890 | char *contents; | |
891 | ||
892 | if (extra_info && name) | |
893 | contents = xstrprintf ("%s \"%s\" (%s)", target_id, | |
894 | name, extra_info); | |
895 | else if (extra_info) | |
896 | contents = xstrprintf ("%s (%s)", target_id, extra_info); | |
897 | else if (name) | |
898 | contents = xstrprintf ("%s \"%s\"", target_id, name); | |
899 | else | |
900 | contents = xstrdup (target_id); | |
901 | str_cleanup = make_cleanup (xfree, contents); | |
902 | ||
903 | ui_out_field_string (uiout, "target-id", contents); | |
904 | do_cleanups (str_cleanup); | |
8e8901c5 | 905 | } |
4f8d22e3 PA |
906 | |
907 | if (tp->state_ == THREAD_RUNNING) | |
94cc34af PA |
908 | ui_out_text (uiout, "(running)\n"); |
909 | else | |
910 | { | |
911 | /* The switch below puts us at the top of the stack (leaf | |
912 | frame). */ | |
913 | switch_to_thread (tp->ptid); | |
914 | print_stack_frame (get_selected_frame (NULL), | |
915 | /* For MI output, print frame level. */ | |
916 | ui_out_is_mi_like_p (uiout), | |
917 | LOCATION); | |
918 | } | |
8e8901c5 | 919 | |
90139f7d VP |
920 | if (ui_out_is_mi_like_p (uiout)) |
921 | { | |
922 | char *state = "stopped"; | |
5d502164 | 923 | |
ed406532 | 924 | if (tp->state_ == THREAD_RUNNING) |
90139f7d VP |
925 | state = "running"; |
926 | ui_out_field_string (uiout, "state", state); | |
927 | } | |
928 | ||
dc146f7c VP |
929 | core = target_core_of_thread (tp->ptid); |
930 | if (ui_out_is_mi_like_p (uiout) && core != -1) | |
931 | ui_out_field_int (uiout, "core", core); | |
932 | ||
8e8901c5 | 933 | do_cleanups (chain2); |
c906108c SS |
934 | } |
935 | ||
99b3d574 DP |
936 | /* Restores the current thread and the frame selected before |
937 | the "info threads" command. */ | |
938 | do_cleanups (old_chain); | |
c906108c | 939 | |
aea5b279 | 940 | if (pid == -1 && requested_threads == NULL) |
8e8901c5 | 941 | { |
4f8d22e3 | 942 | gdb_assert (current_thread != -1 |
d729566a PA |
943 | || !thread_list |
944 | || ptid_equal (inferior_ptid, null_ptid)); | |
0bcd3e20 | 945 | if (current_thread != -1 && ui_out_is_mi_like_p (uiout)) |
8e8901c5 | 946 | ui_out_field_int (uiout, "current-thread-id", current_thread); |
94cc34af | 947 | |
4f8d22e3 PA |
948 | if (current_thread != -1 && is_exited (current_ptid)) |
949 | ui_out_message (uiout, 0, "\n\ | |
950 | The current thread <Thread ID %d> has terminated. See `help thread'.\n", | |
951 | current_thread); | |
d729566a PA |
952 | else if (thread_list |
953 | && current_thread == -1 | |
954 | && ptid_equal (current_ptid, null_ptid)) | |
955 | ui_out_message (uiout, 0, "\n\ | |
956 | No selected thread. See `help thread'.\n"); | |
c906108c | 957 | } |
c906108c SS |
958 | } |
959 | ||
8e8901c5 VP |
960 | /* Print information about currently known threads |
961 | ||
60f98dde MS |
962 | Optional ARG is a thread id, or list of thread ids. |
963 | ||
964 | Note: this has the drawback that it _really_ switches | |
965 | threads, which frees the frame cache. A no-side | |
966 | effects info-threads command would be nicer. */ | |
8e8901c5 VP |
967 | |
968 | static void | |
969 | info_threads_command (char *arg, int from_tty) | |
970 | { | |
aea5b279 | 971 | print_thread_info (uiout, arg, -1); |
8e8901c5 VP |
972 | } |
973 | ||
c378eb4e | 974 | /* Switch from one thread to another. */ |
c906108c | 975 | |
6a6b96b9 | 976 | void |
39f77062 | 977 | switch_to_thread (ptid_t ptid) |
c906108c | 978 | { |
6c95b8df PA |
979 | /* Switch the program space as well, if we can infer it from the now |
980 | current thread. Otherwise, it's up to the caller to select the | |
981 | space it wants. */ | |
982 | if (!ptid_equal (ptid, null_ptid)) | |
983 | { | |
984 | struct inferior *inf; | |
985 | ||
986 | inf = find_inferior_pid (ptid_get_pid (ptid)); | |
987 | gdb_assert (inf != NULL); | |
988 | set_current_program_space (inf->pspace); | |
989 | set_current_inferior (inf); | |
990 | } | |
991 | ||
39f77062 | 992 | if (ptid_equal (ptid, inferior_ptid)) |
c906108c SS |
993 | return; |
994 | ||
39f77062 | 995 | inferior_ptid = ptid; |
35f196d9 | 996 | reinit_frame_cache (); |
c906108c | 997 | registers_changed (); |
94cc34af | 998 | |
4f8d22e3 PA |
999 | /* We don't check for is_stopped, because we're called at times |
1000 | while in the TARGET_RUNNING state, e.g., while handling an | |
1001 | internal event. */ | |
d729566a PA |
1002 | if (!ptid_equal (inferior_ptid, null_ptid) |
1003 | && !is_exited (ptid) | |
1004 | && !is_executing (ptid)) | |
fb14de7b | 1005 | stop_pc = regcache_read_pc (get_thread_regcache (ptid)); |
94cc34af PA |
1006 | else |
1007 | stop_pc = ~(CORE_ADDR) 0; | |
c906108c SS |
1008 | } |
1009 | ||
1010 | static void | |
39f77062 | 1011 | restore_current_thread (ptid_t ptid) |
c906108c | 1012 | { |
dcf4fbde | 1013 | switch_to_thread (ptid); |
99b3d574 DP |
1014 | } |
1015 | ||
1016 | static void | |
4f8d22e3 | 1017 | restore_selected_frame (struct frame_id a_frame_id, int frame_level) |
99b3d574 | 1018 | { |
4f8d22e3 PA |
1019 | struct frame_info *frame = NULL; |
1020 | int count; | |
1021 | ||
eb8c0621 TT |
1022 | /* This means there was no selected frame. */ |
1023 | if (frame_level == -1) | |
1024 | { | |
1025 | select_frame (NULL); | |
1026 | return; | |
1027 | } | |
1028 | ||
4f8d22e3 PA |
1029 | gdb_assert (frame_level >= 0); |
1030 | ||
1031 | /* Restore by level first, check if the frame id is the same as | |
1032 | expected. If that fails, try restoring by frame id. If that | |
1033 | fails, nothing to do, just warn the user. */ | |
1034 | ||
1035 | count = frame_level; | |
1036 | frame = find_relative_frame (get_current_frame (), &count); | |
1037 | if (count == 0 | |
1038 | && frame != NULL | |
005ca36a JB |
1039 | /* The frame ids must match - either both valid or both outer_frame_id. |
1040 | The latter case is not failsafe, but since it's highly unlikely | |
4f8d22e3 PA |
1041 | the search by level finds the wrong frame, it's 99.9(9)% of |
1042 | the time (for all practical purposes) safe. */ | |
005ca36a | 1043 | && frame_id_eq (get_frame_id (frame), a_frame_id)) |
4f8d22e3 PA |
1044 | { |
1045 | /* Cool, all is fine. */ | |
1046 | select_frame (frame); | |
1047 | return; | |
1048 | } | |
99b3d574 | 1049 | |
4f8d22e3 PA |
1050 | frame = frame_find_by_id (a_frame_id); |
1051 | if (frame != NULL) | |
1052 | { | |
1053 | /* Cool, refound it. */ | |
1054 | select_frame (frame); | |
1055 | return; | |
1056 | } | |
99b3d574 | 1057 | |
0c501536 PA |
1058 | /* Nothing else to do, the frame layout really changed. Select the |
1059 | innermost stack frame. */ | |
1060 | select_frame (get_current_frame ()); | |
1061 | ||
1062 | /* Warn the user. */ | |
6c95b8df | 1063 | if (frame_level > 0 && !ui_out_is_mi_like_p (uiout)) |
99b3d574 | 1064 | { |
3e43a32a MS |
1065 | warning (_("Couldn't restore frame #%d in " |
1066 | "current thread, at reparsed frame #0\n"), | |
4f8d22e3 PA |
1067 | frame_level); |
1068 | /* For MI, we should probably have a notification about | |
1069 | current frame change. But this error is not very | |
1070 | likely, so don't bother for now. */ | |
0c501536 | 1071 | print_stack_frame (get_selected_frame (NULL), 1, SRC_LINE); |
c906108c SS |
1072 | } |
1073 | } | |
1074 | ||
6ecce94d AC |
1075 | struct current_thread_cleanup |
1076 | { | |
39f77062 | 1077 | ptid_t inferior_ptid; |
99b3d574 | 1078 | struct frame_id selected_frame_id; |
4f8d22e3 PA |
1079 | int selected_frame_level; |
1080 | int was_stopped; | |
6c95b8df | 1081 | int inf_id; |
6ecce94d AC |
1082 | }; |
1083 | ||
1084 | static void | |
1085 | do_restore_current_thread_cleanup (void *arg) | |
1086 | { | |
4f8d22e3 | 1087 | struct thread_info *tp; |
6ecce94d | 1088 | struct current_thread_cleanup *old = arg; |
d729566a | 1089 | |
e09875d4 | 1090 | tp = find_thread_ptid (old->inferior_ptid); |
d729566a PA |
1091 | |
1092 | /* If the previously selected thread belonged to a process that has | |
1093 | in the mean time been deleted (due to normal exit, detach, etc.), | |
1094 | then don't revert back to it, but instead simply drop back to no | |
1095 | thread selected. */ | |
1096 | if (tp | |
88fc996f | 1097 | && find_inferior_pid (ptid_get_pid (tp->ptid)) != NULL) |
d729566a | 1098 | restore_current_thread (old->inferior_ptid); |
88fc996f | 1099 | else |
6c95b8df PA |
1100 | { |
1101 | restore_current_thread (null_ptid); | |
1102 | set_current_inferior (find_inferior_id (old->inf_id)); | |
1103 | } | |
94cc34af | 1104 | |
4f8d22e3 PA |
1105 | /* The running state of the originally selected thread may have |
1106 | changed, so we have to recheck it here. */ | |
d729566a PA |
1107 | if (!ptid_equal (inferior_ptid, null_ptid) |
1108 | && old->was_stopped | |
4f8d22e3 PA |
1109 | && is_stopped (inferior_ptid) |
1110 | && target_has_registers | |
1111 | && target_has_stack | |
1112 | && target_has_memory) | |
1113 | restore_selected_frame (old->selected_frame_id, | |
1114 | old->selected_frame_level); | |
1115 | } | |
1116 | ||
1117 | static void | |
1118 | restore_current_thread_cleanup_dtor (void *arg) | |
1119 | { | |
1120 | struct current_thread_cleanup *old = arg; | |
1121 | struct thread_info *tp; | |
5d502164 | 1122 | |
e09875d4 | 1123 | tp = find_thread_ptid (old->inferior_ptid); |
4f8d22e3 PA |
1124 | if (tp) |
1125 | tp->refcount--; | |
b8c9b27d | 1126 | xfree (old); |
6ecce94d AC |
1127 | } |
1128 | ||
6208b47d | 1129 | struct cleanup * |
4f8d22e3 | 1130 | make_cleanup_restore_current_thread (void) |
6ecce94d | 1131 | { |
4f8d22e3 PA |
1132 | struct thread_info *tp; |
1133 | struct frame_info *frame; | |
1134 | struct current_thread_cleanup *old; | |
1135 | ||
1136 | old = xmalloc (sizeof (struct current_thread_cleanup)); | |
39f77062 | 1137 | old->inferior_ptid = inferior_ptid; |
6c95b8df | 1138 | old->inf_id = current_inferior ()->num; |
4f8d22e3 | 1139 | |
d729566a PA |
1140 | if (!ptid_equal (inferior_ptid, null_ptid)) |
1141 | { | |
1142 | old->was_stopped = is_stopped (inferior_ptid); | |
1143 | if (old->was_stopped | |
1144 | && target_has_registers | |
1145 | && target_has_stack | |
1146 | && target_has_memory) | |
eb8c0621 TT |
1147 | { |
1148 | /* When processing internal events, there might not be a | |
1149 | selected frame. If we naively call get_selected_frame | |
1150 | here, then we can end up reading debuginfo for the | |
1151 | current frame, but we don't generally need the debuginfo | |
1152 | at this point. */ | |
1153 | frame = get_selected_frame_if_set (); | |
1154 | } | |
d729566a PA |
1155 | else |
1156 | frame = NULL; | |
4f8d22e3 | 1157 | |
d729566a PA |
1158 | old->selected_frame_id = get_frame_id (frame); |
1159 | old->selected_frame_level = frame_relative_level (frame); | |
1160 | ||
e09875d4 | 1161 | tp = find_thread_ptid (inferior_ptid); |
d729566a PA |
1162 | if (tp) |
1163 | tp->refcount++; | |
1164 | } | |
4f8d22e3 PA |
1165 | |
1166 | return make_cleanup_dtor (do_restore_current_thread_cleanup, old, | |
1167 | restore_current_thread_cleanup_dtor); | |
6ecce94d AC |
1168 | } |
1169 | ||
c906108c SS |
1170 | /* Apply a GDB command to a list of threads. List syntax is a whitespace |
1171 | seperated list of numbers, or ranges, or the keyword `all'. Ranges consist | |
1172 | of two numbers seperated by a hyphen. Examples: | |
1173 | ||
c5aa993b JM |
1174 | thread apply 1 2 7 4 backtrace Apply backtrace cmd to threads 1,2,7,4 |
1175 | thread apply 2-7 9 p foo(1) Apply p foo(1) cmd to threads 2->7 & 9 | |
c378eb4e | 1176 | thread apply all p x/i $pc Apply x/i $pc cmd to all threads. */ |
c906108c SS |
1177 | |
1178 | static void | |
fba45db2 | 1179 | thread_apply_all_command (char *cmd, int from_tty) |
c906108c SS |
1180 | { |
1181 | struct thread_info *tp; | |
4f8d22e3 | 1182 | struct cleanup *old_chain; |
e35ce267 | 1183 | char *saved_cmd; |
c906108c SS |
1184 | |
1185 | if (cmd == NULL || *cmd == '\000') | |
8a3fe4f8 | 1186 | error (_("Please specify a command following the thread ID list")); |
94cc34af | 1187 | |
dc146f7c | 1188 | update_thread_list (); |
e9d196c5 | 1189 | |
4f8d22e3 PA |
1190 | old_chain = make_cleanup_restore_current_thread (); |
1191 | ||
e35ce267 | 1192 | /* Save a copy of the command in case it is clobbered by |
c378eb4e | 1193 | execute_command. */ |
5b616ba1 | 1194 | saved_cmd = xstrdup (cmd); |
94cc34af | 1195 | make_cleanup (xfree, saved_cmd); |
c906108c SS |
1196 | for (tp = thread_list; tp; tp = tp->next) |
1197 | if (thread_alive (tp)) | |
1198 | { | |
dcf4fbde | 1199 | switch_to_thread (tp->ptid); |
94cc34af | 1200 | |
a3f17187 | 1201 | printf_filtered (_("\nThread %d (%s):\n"), |
54ba13f7 | 1202 | tp->num, target_pid_to_str (inferior_ptid)); |
c906108c | 1203 | execute_command (cmd, from_tty); |
3e43a32a MS |
1204 | strcpy (cmd, saved_cmd); /* Restore exact command used |
1205 | previously. */ | |
c906108c | 1206 | } |
6ecce94d AC |
1207 | |
1208 | do_cleanups (old_chain); | |
c906108c SS |
1209 | } |
1210 | ||
1211 | static void | |
fba45db2 | 1212 | thread_apply_command (char *tidlist, int from_tty) |
c906108c SS |
1213 | { |
1214 | char *cmd; | |
c906108c | 1215 | struct cleanup *old_chain; |
e35ce267 | 1216 | char *saved_cmd; |
197f0a60 | 1217 | struct get_number_or_range_state state; |
c906108c SS |
1218 | |
1219 | if (tidlist == NULL || *tidlist == '\000') | |
8a3fe4f8 | 1220 | error (_("Please specify a thread ID list")); |
c906108c | 1221 | |
c5aa993b | 1222 | for (cmd = tidlist; *cmd != '\000' && !isalpha (*cmd); cmd++); |
c906108c SS |
1223 | |
1224 | if (*cmd == '\000') | |
8a3fe4f8 | 1225 | error (_("Please specify a command following the thread ID list")); |
c906108c | 1226 | |
e35ce267 | 1227 | /* Save a copy of the command in case it is clobbered by |
c378eb4e | 1228 | execute_command. */ |
5b616ba1 | 1229 | saved_cmd = xstrdup (cmd); |
4f8d22e3 | 1230 | old_chain = make_cleanup (xfree, saved_cmd); |
197f0a60 TT |
1231 | |
1232 | init_number_or_range (&state, tidlist); | |
1233 | while (!state.finished && state.string < cmd) | |
c906108c SS |
1234 | { |
1235 | struct thread_info *tp; | |
65ebfb52 MS |
1236 | int start; |
1237 | char *p = tidlist; | |
c906108c | 1238 | |
197f0a60 | 1239 | start = get_number_or_range (&state); |
c906108c | 1240 | |
65fc9b77 PA |
1241 | make_cleanup_restore_current_thread (); |
1242 | ||
65ebfb52 | 1243 | tp = find_thread_id (start); |
c906108c | 1244 | |
65ebfb52 MS |
1245 | if (!tp) |
1246 | warning (_("Unknown thread %d."), start); | |
1247 | else if (!thread_alive (tp)) | |
1248 | warning (_("Thread %d has terminated."), start); | |
1249 | else | |
1250 | { | |
1251 | switch_to_thread (tp->ptid); | |
4f8d22e3 | 1252 | |
65ebfb52 MS |
1253 | printf_filtered (_("\nThread %d (%s):\n"), tp->num, |
1254 | target_pid_to_str (inferior_ptid)); | |
1255 | execute_command (cmd, from_tty); | |
4f8d22e3 | 1256 | |
65ebfb52 MS |
1257 | /* Restore exact command used previously. */ |
1258 | strcpy (cmd, saved_cmd); | |
c906108c SS |
1259 | } |
1260 | } | |
6ecce94d AC |
1261 | |
1262 | do_cleanups (old_chain); | |
c906108c SS |
1263 | } |
1264 | ||
1265 | /* Switch to the specified thread. Will dispatch off to thread_apply_command | |
1266 | if prefix of arg is `apply'. */ | |
1267 | ||
1268 | static void | |
fba45db2 | 1269 | thread_command (char *tidstr, int from_tty) |
c906108c | 1270 | { |
c906108c SS |
1271 | if (!tidstr) |
1272 | { | |
d729566a PA |
1273 | if (ptid_equal (inferior_ptid, null_ptid)) |
1274 | error (_("No thread selected")); | |
1275 | ||
c906108c | 1276 | if (target_has_stack) |
4f8d22e3 PA |
1277 | { |
1278 | if (is_exited (inferior_ptid)) | |
1279 | printf_filtered (_("[Current thread is %d (%s) (exited)]\n"), | |
1280 | pid_to_thread_id (inferior_ptid), | |
54ba13f7 | 1281 | target_pid_to_str (inferior_ptid)); |
4f8d22e3 PA |
1282 | else |
1283 | printf_filtered (_("[Current thread is %d (%s)]\n"), | |
1284 | pid_to_thread_id (inferior_ptid), | |
54ba13f7 | 1285 | target_pid_to_str (inferior_ptid)); |
4f8d22e3 | 1286 | } |
c906108c | 1287 | else |
8a3fe4f8 | 1288 | error (_("No stack.")); |
c906108c SS |
1289 | return; |
1290 | } | |
c5394b80 | 1291 | |
ce43223b | 1292 | gdb_thread_select (uiout, tidstr, NULL); |
c5394b80 JM |
1293 | } |
1294 | ||
4694da01 TT |
1295 | /* Implementation of `thread name'. */ |
1296 | ||
1297 | static void | |
1298 | thread_name_command (char *arg, int from_tty) | |
1299 | { | |
1300 | struct thread_info *info; | |
1301 | ||
1302 | if (ptid_equal (inferior_ptid, null_ptid)) | |
1303 | error (_("No thread selected")); | |
1304 | ||
1305 | while (arg && isspace (*arg)) | |
1306 | ++arg; | |
1307 | ||
1308 | info = inferior_thread (); | |
1309 | xfree (info->name); | |
1310 | info->name = arg ? xstrdup (arg) : NULL; | |
1311 | } | |
1312 | ||
60f98dde MS |
1313 | /* Find thread ids with a name, target pid, or extra info matching ARG. */ |
1314 | ||
1315 | static void | |
1316 | thread_find_command (char *arg, int from_tty) | |
1317 | { | |
1318 | struct thread_info *tp; | |
1319 | char *tmp; | |
1320 | unsigned long match = 0; | |
1321 | ||
1322 | if (arg == NULL || *arg == '\0') | |
1323 | error (_("Command requires an argument.")); | |
1324 | ||
1325 | tmp = re_comp (arg); | |
1326 | if (tmp != 0) | |
1327 | error (_("Invalid regexp (%s): %s"), tmp, arg); | |
1328 | ||
1329 | update_thread_list (); | |
1330 | for (tp = thread_list; tp; tp = tp->next) | |
1331 | { | |
1332 | if (tp->name != NULL && re_exec (tp->name)) | |
1333 | { | |
1334 | printf_filtered (_("Thread %d has name '%s'\n"), | |
1335 | tp->num, tp->name); | |
1336 | match++; | |
1337 | } | |
1338 | ||
1339 | tmp = target_thread_name (tp); | |
1340 | if (tmp != NULL && re_exec (tmp)) | |
1341 | { | |
1342 | printf_filtered (_("Thread %d has target name '%s'\n"), | |
1343 | tp->num, tmp); | |
1344 | match++; | |
1345 | } | |
1346 | ||
1347 | tmp = target_pid_to_str (tp->ptid); | |
1348 | if (tmp != NULL && re_exec (tmp)) | |
1349 | { | |
1350 | printf_filtered (_("Thread %d has target id '%s'\n"), | |
1351 | tp->num, tmp); | |
1352 | match++; | |
1353 | } | |
1354 | ||
1355 | tmp = target_extra_thread_info (tp); | |
1356 | if (tmp != NULL && re_exec (tmp)) | |
1357 | { | |
1358 | printf_filtered (_("Thread %d has extra info '%s'\n"), | |
1359 | tp->num, tmp); | |
1360 | match++; | |
1361 | } | |
1362 | } | |
1363 | if (!match) | |
1364 | printf_filtered (_("No threads match '%s'\n"), arg); | |
1365 | } | |
1366 | ||
93815fbf VP |
1367 | /* Print notices when new threads are attached and detached. */ |
1368 | int print_thread_events = 1; | |
1369 | static void | |
1370 | show_print_thread_events (struct ui_file *file, int from_tty, | |
1371 | struct cmd_list_element *c, const char *value) | |
1372 | { | |
3e43a32a MS |
1373 | fprintf_filtered (file, |
1374 | _("Printing of thread events is %s.\n"), | |
93815fbf VP |
1375 | value); |
1376 | } | |
1377 | ||
c5394b80 | 1378 | static int |
6949171e | 1379 | do_captured_thread_select (struct ui_out *uiout, void *tidstr) |
c5394b80 JM |
1380 | { |
1381 | int num; | |
1382 | struct thread_info *tp; | |
1383 | ||
81490ea1 | 1384 | num = value_as_long (parse_and_eval (tidstr)); |
c906108c SS |
1385 | |
1386 | tp = find_thread_id (num); | |
1387 | ||
8b93c638 | 1388 | if (!tp) |
8a3fe4f8 | 1389 | error (_("Thread ID %d not known."), num); |
c906108c SS |
1390 | |
1391 | if (!thread_alive (tp)) | |
8a3fe4f8 | 1392 | error (_("Thread ID %d has terminated."), num); |
c906108c | 1393 | |
dcf4fbde | 1394 | switch_to_thread (tp->ptid); |
c906108c | 1395 | |
db5a7484 NR |
1396 | annotate_thread_changed (); |
1397 | ||
8b93c638 | 1398 | ui_out_text (uiout, "[Switching to thread "); |
39f77062 | 1399 | ui_out_field_int (uiout, "new-thread-id", pid_to_thread_id (inferior_ptid)); |
8b93c638 | 1400 | ui_out_text (uiout, " ("); |
54ba13f7 | 1401 | ui_out_text (uiout, target_pid_to_str (inferior_ptid)); |
8b93c638 | 1402 | ui_out_text (uiout, ")]"); |
c5394b80 | 1403 | |
4f8d22e3 PA |
1404 | /* Note that we can't reach this with an exited thread, due to the |
1405 | thread_alive check above. */ | |
1406 | if (tp->state_ == THREAD_RUNNING) | |
94cc34af | 1407 | ui_out_text (uiout, "(running)\n"); |
4f8d22e3 | 1408 | else |
98871305 TT |
1409 | { |
1410 | ui_out_text (uiout, "\n"); | |
1411 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC); | |
1412 | } | |
4f8d22e3 PA |
1413 | |
1414 | /* Since the current thread may have changed, see if there is any | |
1415 | exited thread we can now delete. */ | |
1416 | prune_threads (); | |
94cc34af | 1417 | |
c5394b80 JM |
1418 | return GDB_RC_OK; |
1419 | } | |
1420 | ||
1421 | enum gdb_rc | |
ce43223b | 1422 | gdb_thread_select (struct ui_out *uiout, char *tidstr, char **error_message) |
c5394b80 | 1423 | { |
b0b13bb4 DJ |
1424 | if (catch_exceptions_with_msg (uiout, do_captured_thread_select, tidstr, |
1425 | error_message, RETURN_MASK_ALL) < 0) | |
1426 | return GDB_RC_FAIL; | |
1427 | return GDB_RC_OK; | |
c906108c SS |
1428 | } |
1429 | ||
dc146f7c VP |
1430 | void |
1431 | update_thread_list (void) | |
1432 | { | |
1433 | prune_threads (); | |
1434 | target_find_new_threads (); | |
1435 | } | |
1436 | ||
6aed2dbc SS |
1437 | /* Return a new value for the selected thread's id. Return a value of 0 if |
1438 | no thread is selected, or no threads exist. */ | |
1439 | ||
1440 | static struct value * | |
1441 | thread_id_make_value (struct gdbarch *gdbarch, struct internalvar *var) | |
1442 | { | |
1443 | struct thread_info *tp = find_thread_ptid (inferior_ptid); | |
1444 | ||
1445 | return value_from_longest (builtin_type (gdbarch)->builtin_int, | |
1446 | (tp ? tp->num : 0)); | |
1447 | } | |
1448 | ||
c906108c SS |
1449 | /* Commands with a prefix of `thread'. */ |
1450 | struct cmd_list_element *thread_cmd_list = NULL; | |
1451 | ||
1452 | void | |
fba45db2 | 1453 | _initialize_thread (void) |
c906108c SS |
1454 | { |
1455 | static struct cmd_list_element *thread_apply_list = NULL; | |
c906108c | 1456 | |
60f98dde MS |
1457 | add_info ("threads", info_threads_command, |
1458 | _("Display currently known threads.\n\ | |
1459 | Usage: info threads [ID]...\n\ | |
1460 | Optional arguments are thread IDs with spaces between.\n\ | |
1461 | If no arguments, all threads are displayed.")); | |
c906108c | 1462 | |
d729566a | 1463 | add_prefix_cmd ("thread", class_run, thread_command, _("\ |
1bedd215 AC |
1464 | Use this command to switch between threads.\n\ |
1465 | The new thread ID must be currently known."), | |
d729566a | 1466 | &thread_cmd_list, "thread ", 1, &cmdlist); |
c906108c | 1467 | |
d729566a PA |
1468 | add_prefix_cmd ("apply", class_run, thread_apply_command, |
1469 | _("Apply a command to a list of threads."), | |
1470 | &thread_apply_list, "thread apply ", 1, &thread_cmd_list); | |
c906108c | 1471 | |
d729566a PA |
1472 | add_cmd ("all", class_run, thread_apply_all_command, |
1473 | _("Apply a command to all threads."), &thread_apply_list); | |
c906108c | 1474 | |
4694da01 TT |
1475 | add_cmd ("name", class_run, thread_name_command, |
1476 | _("Set the current thread's name.\n\ | |
1477 | Usage: thread name [NAME]\n\ | |
1478 | If NAME is not given, then any existing name is removed."), &thread_cmd_list); | |
1479 | ||
60f98dde MS |
1480 | add_cmd ("find", class_run, thread_find_command, _("\ |
1481 | Find threads that match a regular expression.\n\ | |
1482 | Usage: thread find REGEXP\n\ | |
1483 | Will display thread ids whose name, target ID, or extra info matches REGEXP."), | |
1484 | &thread_cmd_list); | |
1485 | ||
c906108c SS |
1486 | if (!xdb_commands) |
1487 | add_com_alias ("t", "thread", class_run, 1); | |
93815fbf VP |
1488 | |
1489 | add_setshow_boolean_cmd ("thread-events", no_class, | |
1490 | &print_thread_events, _("\ | |
11c68c47 EZ |
1491 | Set printing of thread events (such as thread start and exit)."), _("\ |
1492 | Show printing of thread events (such as thread start and exit)."), NULL, | |
93815fbf VP |
1493 | NULL, |
1494 | show_print_thread_events, | |
1495 | &setprintlist, &showprintlist); | |
6aed2dbc SS |
1496 | |
1497 | create_internalvar_type_lazy ("_thread", thread_id_make_value); | |
c906108c | 1498 | } |